SSANGYONG Rexton Y200 Manual page 894

TIRES AND ABS/TCS
Replacement Tires
Tire size is important for proper performance of the
ABS system. Replacement tires should be the same
size, load range, and construction as the original tires.
Replace tires in axle sets and only with tires of the
same tire performance criteria (TPC) specification
number.
The use of any other size or type of tire may seriously
affect the ABS operation.
Electronic Brake Control Module (EBCM)
Notice: There is on serviceable or removable
EEPROM. The EBCM must be replaced as an assembly
(Only ABS). ABS/TCS is separated hydraulic modulator
and EBCM.
The EBCM is attached to the hydraulic unit in the engine
compartment (ABS). The controlling element of ABS
5.3 is a microprocessor-based EBCM. Inputs to the
system include the four wheel speed sensors, the
stoplamp switch, the ignition switch, and the
unswitched battery voltage. There is an output to a
be-directional serial data link, located in pin K of
Assembly Line Diagnostic Link (ALDL) for service
diagnostic tools and assembly plant testing.
The EBCM monitors the speed of each wheel. If any
wheel begins to approach lockup and the brake switch
is closed (brake pedal pressed), the EBCM controls
the solenoids to reduce brake pressure to the wheel
approaching lockup. Once the wheel regains traction,
brake pressure is increased until the wheel again
begins to approach lockup. This cycle repeats until
either the vehicle comes to a stop, the brake pedal is
released, or no wheels approach lockup.
Additionally, the EBCM monitors itself, each input
(except the serial data link), and each output for proper
operation. If it detects any system malfunction, the
EBCM will store a DTC in nonvolatile memory
(EERPOM) (DTCs will not disappear if the battery is
disconnected). Refer to "Self Diagnostics" in this
section for more detailed information.
Front Wheel Speed Sensors
The front wheel speed sensors are of a variable
reluctance type. Sensor is attached to the steering
knuckle, close to a toothed ring. The result, as teeth
pass by the sensor, is an AC voltage with a frequency
proportional to the speed of the wheel. The magnitude
of the voltage and frequency increase with increasing
speed. The sensor is not repairable, nor is the air gap
adjustable.
SSANGYONG Y200
Front Wheel Speed Sensor Rings
The toothed ring mentioned above is pressed onto the
wheel-side (outer) constant velocity joint. Each ring
contains 52 equally spaced teeth. Exercise care during
service procedures to avoid prying or contacting this
ring. Excessive contact may cause damage to one or
more teeth. If the ring is damaged, the wheel-side
constant velocity joint must be replaced.
Rear Wheel Speed Sensors And Rings
The rear wheel speed sensors operate in the same
manner as the front wheel speed sensor. They
incorporate a length of flexible harness with the
connector attached to the end of the harness. The rear
wheel speed rings are incorporated into the hub
assemblies and cannot be replaced separately, require
replacement of the rear hub/bearing assembly.
Valve Realy And Pump Motor Relay
The valve relay and the motor pump relay are located
inside the electronic brake control module (EBCM) and
are not replaceable. If one should fail, replace the
EBCM.
Wiring Harness
The wiring harness is the mechanism by which the
electronic brake control module (EBCM) is electrically
connected to power and to ground, to the wheel speed
sensors, the fuses, the switches, the indicators, and
the serial communications port. The components,
considered part of the wiring harness, are the wires
that provide electrical interconnection, and connectors
(terminals, pins, contacts, or lugs) that provide an
electrical/mechanical interface from the wire to a
system component.
Indicators
The electronic brake control module (EBCM)
continuously monitors itself and the other ABS
components If the EBCM detects a problem with the
system, the amber ABS indicator will light continuously
to alert the driver to the problem. An illuminated ABS
indicator indicates that the ABS system has detected
a problem that affects the operation of ABS. On
antilock braking will be available. Normal, non-antilock
brake performance will remain. In order to regain ABS
braking ability, the ABS must be serviced.
The red BRAKE indicator will be illuminated when the
system detects a low brake fluid level in the master
cylinder or when the parking brake switch is closed
(the parking brake is engaged).
The EBD indicator will light continuously to alert the
driver to the problem in the basic brake system. The
EBD system must be serviced.
ABS AND TCS 4E-9